In america, you can get sued for anything . Chuck does make a valid point. Why do you think they have insurance for sanctioned events????
Crazy story, my friends own a large paintball field here in Funkytown. . Every participant signs a liability waiver prior to play. Some kid, slips on some paint , breaks an arm and they get sued . THE KID'S PARENTS SIGNED THE LIABILITY WAIVER, AND THEY STILL GOT SUED. They are currently in the process of setteling out of court right now.